| 引用本文: | 王冰蕊,才硕,郭巧玲,等.水稻抗氧化性及产量对稻田淹涝退水过程的响应研究[J].灌溉排水学报,0,():-. |
| wangbingrui,caishuo,guoqiaoling,et al.水稻抗氧化性及产量对稻田淹涝退水过程的响应研究[J].灌溉排水学报,0,():-. |
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| 水稻抗氧化性及产量对稻田淹涝退水过程的响应研究 |
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王冰蕊1,2, 才硕2, 郭巧玲1, 时红1,2, 时元智3, 赵树君4, 姜成名2
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1.东华理工大学;2.江西省灌溉试验中心站;3.南京水利科学院;4.三峡大学
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| 摘要: |
| 【目的】探究鄱阳湖区汛涝期稻田淹涝背景下，不同淹涝退水过程对水稻抗氧化性以及产量的影响。【方法】采用盆栽试验方法，在中稻拔节期分别设置泥沙含量（S0: 0 kg/m3；S1:: 0.10 kg/m3；S2: 0.25 kg/m3）、淹没历时（F1: 3d；F2: 6d）和退水历时（D1: 3d；D2: 6d）不同处理组合，同时设置正常控水生长的对照（CK），共13个处理。通过测定水稻剑叶SPAD值、叶片抗氧化性酶活性以及产量，研究水稻生长对不同淹涝退水过程的响应机制。【结果】①水稻叶片SPAD值随泥沙含量、淹没历时或退水历时的增加而减少，在淹没结束并开始退水前达到最低值，S2F2D2处理在持续淹没达到6d时较CK下降幅度最大（46.40%）。②水稻叶片SOD酶活性、POD酶活性及MDA含量随淹涝退水过程先上升后下降，均在淹没结束并开始退水前达到最大值。③水稻经不同淹涝退水处理后表现为千粒重显著下降（P＜0.05），进而导致水稻产量的降低，其中S0F2D2和S2F2D2处理较CK减产幅度最大，分别达到52.22%、52.00%。【结论】受拔节期不同淹涝退水过程的影响，中稻抗氧化性增强、产量下降。与泥沙含量相比，淹没历时和退水历时是影响水稻产量的主要因素，表现为淹没退水历时越长产量减幅越大。因此，在本试验条件下，将中稻拔节期淹涝退水历时控制在6d内，可有效减少水稻受灾、降低洪涝损失。 |
| 关键词: 水稻；淹涝；泥沙含量；退水；抗氧化 |
| DOI： |
| 分类号:S274.1 |
| 基金项目:江西水利科技项目(202124ZDKT29,202123BZKT04,202123BZKT05,KT201630) |
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| Response of Rice Oxidation Resistance and Yield to the Process of Rice Field Waterlogging and Drainage |
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wangbingrui1,2, caishuo2, guoqiaoling1, shihong1,2, shiyuanzhi3, zhaoshujun4, jiangchengming2
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1.East China University of Technology;2.Jiangxi Central Station of Irrigation Experiment;3.Nanjing Hydraulic Research Institute;4.China Three Gorges University
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| Abstract: |
| Abstract: 【Objective】May to July every year is the nutrient growth period of rice in Poyang Lake area, which is also the plum rainy season in southern China, and rice is vulnerable to flood stress. The purpose of this paper is to explore the effects of different waterlogging regression processes on oxidation resistance and yield of rice during the plum rainy season in Poyang Lake area. 【Method】The experiment was conducted at a pot scale with semilate rice of elongation stage. There were three sediment content treatments: 0 kg/m3(S0), 0.10 kg/m3(S1), 0.25 kg/m3(S2), and two subermerged duration treatments: 3d(F1), 6d(F2). For each combination of three sediment content treatments and two subermerged duration treatments, we also compared two drainage duration treatments: 3d(D1), 6d(D2); the control (CK) was no amendment-normal water-controlled growth, and a total of 13 treatments. In each treatment, we measured the SPAD value, activity of antioxidant enzyme in the flag leaf and yield of rice, from which we explored the response mechanism of rice to different waterlogging regression processes. 【Result】①The SPAD value of flag leaf decreased with increasing sediment content, submerged duration or water withdrawal duration, each treatment reached the lowest value before drainage. And the S2F2D2 showed the largest decrease after continuously submerged for 6 days, which decreased by 46.20%, compared with the CK. ②The activities of SOD, POD, and MDA content in rice flag leaves increased first and then decreased during the different waterlogging regression processes, all of them reached the maximum value before drainage. ③After different waterlogging drainage treatment, the 1000-grain weight of semilate rice was significantly different from CK (P<0.05), which led to a decrease in the rice yield. S0F2D2 and S2F2D2 treatments had serious yield reductions, reaching 52.22% and 52.00% respectively compared with the CK.【Conclusion】Affected by the different waterlogging and drainage processes at the elongation stage, the oxidation resistance of the semilate rice leaves was enhanced and the yield decreased. Compared with sediment content, the subermerged duration and drainage duration are the main factor affecting rice yield, which is manifested in the longer the flooding period, the greater the yield reduction. Therefore, under the conditions of this experiment, the waterlogging and drainage time of the middle rice elongation period is controlled within 6 days, which can effectively reduce the disaster of rice and flood losses. |
| Key words: rice; waterlogging; sediment content; drainage; oxidation resistance |
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